Results 11 to 20 of about 176 (118)

Methods of constructing hyperfields [PDF]

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1985
In this paper we introduce a class of hyperfields which contains non quotient hyperfields. Thus we give a negative answer to the question of whether every hyperfield is isomorphic to a quotient KG of a field K by some subgroup G of its multiplicative ...
Ch. G. Massouros
doaj   +5 more sources

A class of hyperrings and hyperfields [PDF]

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1983
Hyperring is a structure generalizing that of a ring, but where the addition is not a composition, but a hypercomposition, i.e., the sum x+y of two elements, x,y, of a hyperring H is, in general, not an element but a subset of H.
Marc Krasner
doaj   +5 more sources

Characteristic, C-Characteristic and Positive Cones in Hyperfields

open access: yesMathematics, 2023
We study the notions of the positive cone, characteristic and C-characteristic in (Krasner) hyperfields. We demonstrate how these interact in order to produce interesting results in the theory of hyperfields.
Dawid Edmund Kedzierski   +2 more
exaly   +7 more sources

Recent results in hyperring and hyperfield theory [PDF]

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1988
This survey article presents some recent results in the theory of hyperfields and hyperrings, algebraic structures for which the “sum” of two elements is a subset of the structure.
Anastase Nakassis
doaj   +5 more sources

Codes Over Hyperfields

open access: yesDiscussiones Mathematicae - General Algebra and Applications, 2017
In this paper, we define linear codes and cyclic codes over a finite Krasner hyperfield and we characterize these codes by their generator matrices and parity check matrices.
Atamewoue Surdive   +3 more
doaj   +4 more sources

Tropical geometry over the tropical hyperfield [PDF]

open access: yesRocky Mountain Journal of Mathematics, 2022
In this text, we merge ideas around the tropical hyperfield with the theory of ordered blueprints to give a new formulation of tropical scheme theory. The key insight is that a nonarchimedean absolute value can be considered as a morphism into the tropical hyperfield.
Oliver Lorscheid
exaly   +7 more sources

On the Borderline of Fields and Hyperfields

open access: yesMathematics, 2023
The hyperfield came into being due to a mathematical necessity that appeared during the study of the valuation theory of the fields by M. Krasner, who also defined the hyperring, which is related to the hyperfield in the same way as the ring is related ...
Christos G. Massouros   +1 more
doaj   +5 more sources

Valuations on Structures More General Than Fields

open access: yesComputer Sciences & Mathematics Forum, 2023
Valuation theory is an important area of investigation in algebra, with applications in algebraic geometry and number theory. In 1957, M. Krasner introduced hyperfields, which are field-like objects with a multivalued addition, to describe some ...
Alessandro Linzi
doaj   +3 more sources

Commutative hypergroups associated with a hyperfield [PDF]

open access: yesInfinite Dimensional Analysis, Quantum Probability and Related Topics, 2017
Let [Formula: see text] be a commutative hypergroup and [Formula: see text] a discrete commutative hypergroup. In this paper we introduce a commutative hypergroup [Formula: see text] associated with a hyperfield [Formula: see text] of [Formula: see text] based on [Formula: see text].
Heyer, Herbert   +3 more
openaire   +4 more sources

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